us now. ed? >> reporter: andrea, good to see you. after days of laying low on syria, the president let his secretary of state, john kerry, take the lead on this issue twice this week. he came out a short time ago and spoke out, went after president assad in syria by basically saying this is a challenge to the world right now to step up and lead in the wake of this gas attack that killed, according to the administration, over 1400 people, mostly women and children inside syria. but the president now finds himself in a very difficult position. this is a nobel peace prize winner, someone that ran for president in 2008 saying you have to go to the u.n., you have to get congressional authorization before you act militarily. now standing alone on the world stage, pushing basically for unilateral u.s. military action, the president seeing his reset with russia, now in tatters at the united nations, his ally not delivering on building a coalition yesterday. so the president stepped up today, started making his case. said he hadn't made a final decision, but started to make a case for u.s.